Locomotive-smoke deflector



Aug. 13-, 1929. F. a. GILLETT ET AL.

LOCOMOTIVE SMOKE DEFLECTOR Filed Dec. 28, 1927 2 Sheets-Sheet 1 INVENTORS. "Exam/K an W940i 1 EH1 d ATTORNEYJ.

g- 1929. F. B. GILLETT ET AL 1,724,276

LOCOMOTIVE SMOKE DEFLECTOR Filed Dec. 28. 1927 2 Sheets-Sheet 2 INVENTORS $2M Z /3.

A TTORNE YS.

Patented 13, 1929.

' UNHTED STATES PATENT OFFICE.

FRANK B. GILLETT', OF SACRAMENTO, AND JOHN G. LACKm, F EOSEVILLE, CALI- FORNIA.

App1ication filed December 28, 1927.

Our invention relates to smoke-deflectors especially adapted for locomotive smoke stacks.

Devices of this nature essentially comprise a hood fitted by a hinge connection to the smoke-stack, and adapted, by means of fluid operated instrumentalities, under control from the cab, to be turned from a normally inoperative position to a functional position for deflecting the issuing products of combustion into a course less annoying to the enginemen, as, for example, over the top of the cab, thus relieving its occupants when going through tunnels, snow sheds, and similar structures from the smoke and heat ordinarily reflected from the roofs of such inclosures.

Our invention has for its object the provision of a device of this class, simple in structure; easy to operate; eflicient in function; and especially compact adapting it for high locomotives.

To these ends our invention comprises a two part-hood, the relatively small sections of which are mounted oppositely upon the smoke stack, swinging apart in opposite directionsto uncover and expose the stack to its normal direction of discharge, and swinging together over the stack to change the course of the issuing smoke to an angle with the normal discharge, in practise a backward direction over the cab. The structure of these hood. sections with regard to their removable and replaceable plates subject to the corrosive action ot the issuing gases, the mounting of said sections and the fluid control instrumentalities by which they are operated, are also comprised in our invention, which, as a whole consists in the novel construction, arrangement and combination of parts hereinafter fully described, it being understood that changes may be made within the spirit of the invention as defined by the claims hereunto appended.

Referring to the accompanying drawings which illustrate our smoke deflector in its preferred form,

Fig. 1 is a part sectional side elevation of our deflector applied to a locomotive smoke stack, shown in closed or deflecting position in full lines and in open position in broken lines.

Fig. 2 is a plan view of the same.

Fig. 3 is a partly diagrammatic view of the operating cylinder and control valve.

Q LOCOMOTIVE- MOKE DEFLECTOB.

Serial No. 243,108.

Fig. 4: is a central vertical section of our deflector applied to a locomotive smoke stack, the operating mechanism being omitted. L

In the drawings, the numeral 1 designates an anular flange which is secured to the top of the boiler shell 2 in place of the usual smoke stack. Bolted to said flange, by means of projecting ears 3, is a short stack 1-, having its top 5 inclined downwardly toward the rear. The stack has projecting lugs (5 and 7, in which are journalled the swinging hoods 8 and 9. V V

The rear hood 8 comprises two flat side members 10 between which is bolted an arcuate deflector plate 11, the latter having down wardly turned end flanges 12 by which it is secured t6 said side members 10. The side members have bosses 13 which are secured upon a transverse shaft 14: journalled in the stack lugs 6. A gear 15 is secured upon one end of said shaft.

The forward hood 9 comprises side plates 16, a front plate 17 which is preferably welded, at 18, to said side plates and whose bottom is curved to fit the top front portion of the stack, and a removable arcuate deflector plate 19 provided with downwardly turned flanges 20 by which it is bolted to said side plates. The lower edge of said deflector plate 19 fits closely against the top of the front plate 17, preferably with a flanged joint shown at 21. The side plates 16 have bosses 22 pivotally connected with the stack lugs 7, and one of said bosses is fixed to a short shaft 23 which also carries a gear 24.

When the two hoods 8 and 9 are in closed position, as shown in full lines in Figs. 1

and 4, their side plates meet in close fitting vertical flanged joints 25, and their bottoms fit closely around the top oi the stack 1-. The arcuate deflector plates 11 and 19 are so positioned that they deflect the smoke issuing vertically from the stack and direct it rearwardly over the top of the cab. When the hoods are swung to their open position, as shown in broken lines in Figs. 1 and at, they clear the stack entirely, and the smoke can issue in its normal path, that is, vertically.

We employ a fluid operated mechanism, controlled by a valve in the cab, for opening and closing the hoods. Compressed air, taken from the loeomotives air receiver, is most convenient for the operating fluid. On

one side of the stack is mounted a vertically disposed cylinder 26, containing a slidable piston 2?. This piston has two heads equipped with suitable packing rings 28, and said heads are connected by a body portion formed with a slot 29 extending through it. In said slot are seated the ends 30 of oppositely extending levers 31 which are pivoted at 82 and have gear segments 33 engaging the gears 15 and 24. A suitable housing 34 encloses said levers and gears. Thus when the piston 27 moves down, the hoods are opened, and when itmoves up they are closed. A block 35 in the bottom of the cylinder acts as a stop to limit the downward travel of the piston and the consequent opening movement of the hoods.

A retarding effect in the form of a dash pot is provided to prevent sudden movement or slamming of the hoods, and comprises a cylinder 36 formed in the upper part of the piston 23, and a plunger 37 operating in said cylinder and fixed to the upper head of the main cylinder 26 by a rod 38. A cap 89 closesthe upper end of the dash pot 36 and is provided with suitable packing 40 around'the rod 38. The dash pot is filled with oil or other suitable liquid, which passes through restricted .ports 41 in the plunger 37 N thereby retarding the movement of the main piston 27.

The device is operated by a suitable fourway valve in the cab of the locomotive, as indicated at 42 in Fig. 3. 48 is the fluid supply pipe, leading from the locomotive air receiver, for example, 44 and 45 are pipes leading to the top and bottom respectively of the cylinder 26, and 46 is the discharge. The valve 42 is of well known construction, and its interior is therefore not shown. It is understood, however, that in one position, it admits air through the pipe 44 to the top of the cylinder to move the piston down and open the hoods, and

at the same time to allow the air to escape from the bottom of the cylinder through v the pipe 45 and discharge 46. In the other position, air is admitted through the pipe 45 to the bottom ofthe cylinder to move :the piston up and close the hoods, the air from the top of the cylinder escaping through the pipe 44.

It will be observed that our deflector, by being made in two oppositely swinging sections, is comparatively low in height, and is, therefore, well adapted for use on large locomotives, in which the tops of the boilers approach within a few inches of the maximum height allowed by fixed overhead structures, and further, that this saving in height does not impair the effectiveness of the device. 7 When the hoods are open, they clear theentire area of the stack, and when closed the deflector plates 11 and 19 intercept and deflect the smoke without any restriction off the discharge area.

It should also be noted that the deflector plates 11 and 19, which are the only parts subject to the wearin action of the smoke and hot gases, are secured only by two bolts each, and can therefore be removed and replaced quickly and at small cost.

76 claim 1. A smoke deflector especially adapted for locomotive smoke stacks, comprising a pair of hoods hinged to the stac and adapted, when swung apart, to expose the stack to its normal vertical direction of discharge, and when swung together, to deflect said discharge to an angle from the normal; fluid controlled means for swinging said hoods; and means for controlling said fluid controlled means adapted by retarding their movement to guard against sudden and slamming action of said hoods.

2. A smoke deflector especially adapted for locomotive smoke stacks, comprising a pair of hoods hinged to the stack and adapted, when swung apart, to expose the stack to its normal vertical direction of discharge, and when swung together, to deflect said discharge to an angle from the normal; a cylinder adjacent the stack having a piston; connections between said piston and said hoods to swing the latter; retarding means carried by the piston; and fluid pressure connections for operating the piston.

3. A smoke deflector especially adapted for locomotive smoke stacks, comprising a pair of hoods hinged to the stack and adapted, when swung apart, to expose the stackto its normal vertical direction of discharge, and when swung together, to deflect said discharge to an angle from the normal; a cylinder adjacent the stack having a piston; a pair of oppositely disposed levers connecting said piston with said hoods for operating the latter; and fluid pressure connections for operating the piston.

4. A smoke deflector especially adapted for locomotive smoke stacks, comprising a pair of hoods hinged to the stack and adapted, when swung apart, to expose the stack to its normal vertical direction of discharge, and when swung together, to deflect said discharge to an angle from the normal; a cylinder adjacent the stack having a piston; a pair of oppositely disposed levers having their adjacent inner ends connected with said piston; gear segments formed upon the outer ends of said levers; gears secured to said hoods and meshing respectively with said lever gear segments; and fluid pressure connections for operating said piston.

5. A smoke deflector especially adapted for locomotive smoke stacks, comprising a pair of movable hoods having side members exteriorly fitting the stack and deflecting plates secured between said side members, said hoods being associated with the stack in position adapting them, when separated, to expose the stack to its normal direction of discharge, and, when closed to a meeting of their side members, to direct said discharge at an angle to the normal.

6. The combination with a smoke stack of a pair of complementary hoods each having a smoke deflecting surface positioned above the stack outlet; and pivotal mountings for said hoods adapting them to swing clear of said outlet.

7. The combination with a smoke stack of a pair of complementary hoods having substantially parallel smoke deflecting surfaces positioned above the stack outlet; and pivotal mountings for said hoods adapting them to swing clear of said outlet.

8. The combination with a smoke stack of a' pair of complementary oppositely swinging hoods having substantially parallel smoke deflecting surfaces adapted to be positioned, by the swinging of the hoods, above or beside the stack outlet.

9. The combination with a smoke stack of a pair of complementary hoods; a removable smoke deflecting plate carried by each hood; and pivotal mountings for said hoods adapting them to be swung clear of the stack outlet. i

10. The combination with a smoke stack of a pair of complementary swinging hoods each having a smoke deflecting surface positioned above the stack outlet; and fluid controlled means for swinging said hoods'clear of said outlet.

In testimony whereof we have signed our names to this specification.

FRANK B. GILLETT. JOHN G. LACKEY. 

